Elizabeth Warren and other senators on a banking committee will have the chance to drill the head of Wells Fargo next week over a million illegal accounts opened for customers without their knowledge, both sides said Tuesday.

Wells Fargo Chairman and CEO John G. Stumpf accepted an invitation to testify before the Senate Committee on Banking, Housing, and Urban Affairs at a Sept. 20 hearing.

The bank was fined a total of $185 million by California and federal regulators last week and around 5,300 employees were fired after it was discovered workers illegally opened unauthorized accounts in order to meet sales goals.